docs(readme): real phone screenshots of the new Enter button toolbar

Two captures from an actual phone, replacing the placeholder-ish shots:

- Mobile table, middle cell: the full-height capture with the keyboard open,
  showing the accessory bar and the new Enter button while answering a plan
  prompt. Supersedes mobile-session-question-20260727.png from this morning,
  which showed the pre-Enter toolbar.
- Touch-Optimized Interface: the cropped toolbar capture as a standalone
  560px figure, where a near-square crop reads better than it would squeezed
  into a 260px table cell.

Picking the tall capture for the table also fixes a row the earlier square
shot had left lopsided: the three cells now render 473 / 482 / 469px tall
instead of 473 / 263 / 469.

Adds a "Dedicated Enter button" bullet documenting the behaviour, including
why it replays the keypress (local-echo flush) rather than sending a bare
carriage return, and that shell launching moved into the Run dropdown.
Both READMEs updated so EN and zh-CN stay in sync.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

README.md

@@ -219,7 +219,7 @@ The most responsive AI coding agent experience on any phone. Full xterm.js termi
 <table>
 <tr>
 <td align="center" width="33%"><img src="docs/screenshots/mobile-landing-qr.png" alt="Mobile — landing page with QR auth" width="260"></td>
-<td align="center" width="33%"><img src="docs/screenshots/mobile-session-question-20260727.png" alt="Mobile — answering an agent's multiple-choice prompt with the keyboard accessory bar" width="260"></td>
+<td align="center" width="33%"><img src="docs/screenshots/mobile-session-keyboard-20260727.png" alt="Mobile — answering an agent's plan prompt with the keyboard accessory bar and Enter button" width="260"></td>
 <td align="center" width="33%"><img src="docs/screenshots/mobile-session-active.png" alt="Mobile — active agent session" width="260"></td>
 </tr>
 <tr>
@@ -254,7 +254,12 @@ The security design addresses all 6 critical QR auth flaws identified in ["Demys
 
 ### Touch-Optimized Interface
 
+<p align="center">
+  <img src="docs/screenshots/mobile-toolbar-enter-20260727.png" alt="Mobile toolbar: accessory bar with /init, /clear, clipboard and Esc above the Run, case, stop, Enter, voice and settings controls" width="560">
+</p>
+
 - **Keyboard accessory bar** — `/init`, `/clear`, `/compact` quick-action buttons above the virtual keyboard. Destructive commands (`/clear`, `/compact`) require a double-press to confirm — first tap arms the button, second tap executes — so you never fire one by accident on a bumpy commute
+- **Dedicated Enter button** — submitting is a constant need on a touch keyboard, so the phone toolbar gives it a button of its own. It replays the keypress through the terminal, so text buffered by local echo is flushed first rather than stranded. Starting a shell moves into the Run dropdown (`Terminal / Shell`), which is the rarer action
 - **Swipe navigation** — left/right on the terminal to switch sessions (80px threshold, 300ms)
 - **Smart keyboard handling** — toolbar and terminal shift up when keyboard opens (uses `visualViewport` API with 100px threshold for iOS address bar drift)
 - **Safe area support** — respects iPhone notch and home indicator via `env(safe-area-inset-*)`

README.zh-CN.md

@@ -209,7 +209,7 @@ codeman web -H 0.0.0.0            # 绑定局域网 —— 必须设置 CODEMAN_
 <table>
 <tr>
 <td align="center" width="33%"><img src="docs/screenshots/mobile-landing-qr.png" alt="移动端 — 带二维码认证的登录页" width="260"></td>
-<td align="center" width="33%"><img src="docs/screenshots/mobile-session-question-20260727.png" alt="移动端 — 通过键盘配件栏回答智能体的选择题提示" width="260"></td>
+<td align="center" width="33%"><img src="docs/screenshots/mobile-session-keyboard-20260727.png" alt="移动端 — 通过键盘配件栏与 Enter 按钮回答智能体的方案提示" width="260"></td>
 <td align="center" width="33%"><img src="docs/screenshots/mobile-session-active.png" alt="移动端 — 活动中的智能体会话" width="260"></td>
 </tr>
 <tr>
@@ -244,7 +244,12 @@ codeman web -H 0.0.0.0            # 绑定局域网 —— 必须设置 CODEMAN_
 
 ### 触控优化界面
 
+<p align="center">
+  <img src="docs/screenshots/mobile-toolbar-enter-20260727.png" alt="移动端工具栏：配件栏的 /init、/clear、剪贴板与 Esc，下方是 Run、案例、停止、Enter、语音与设置控件" width="560">
+</p>
+
 - **键盘配件栏** —— 在虚拟键盘上方提供 `/init`、`/clear`、`/compact` 快捷按钮。破坏性命令（`/clear`、`/compact`）需双击确认 —— 第一次点击「上膛」，第二次点击执行 —— 这样在颠簸的通勤路上也不会误触
+- **独立的 Enter 按钮** —— 在触控键盘上提交是高频操作，因此手机工具栏为它单独设了一个按钮。它会以按键的方式回放，从而先冲刷本地回显缓冲的文本，不会让内容滞留在屏幕上。启动 Shell 这类低频操作则移入 Run 下拉菜单（`Terminal / Shell`）
 - **滑动导航** —— 在终端上左右滑动切换会话（阈值 80px，300ms）
 - **智能键盘处理** —— 键盘弹出时工具栏与终端整体上移（使用 `visualViewport` API，并对 iOS 地址栏漂移设置 100px 阈值）
 - **安全区适配** —— 通过 `env(safe-area-inset-*)` 适配 iPhone 刘海与底部 Home 指示条